CODEWITHSUNDEEP
ruby-on-railshashparametershamlrails-activerecord
Blinky
Blinky

Reputation: 210

Converting values in Parameters or a HashWithIndifferentAccess to a useable hash

I'm having trouble finding a way to convert from a parameter hash or a hash with indifferent access to a hash when the values contain hashes.

I'm having trouble converting from this:

hash_indif = {"1570"=>"{:enabled=>false}",
              "1571"=>"{:enabled=>false}",
              "1572"=>"{:enabled=>false}",
              "1573"=>"{:enabled=>false}",
              "1574"=>"{:enabled=>false}",
              "1575"=>"{:enabled=>false}",
              "1576"=>"{:enabled=>false}",
              "1577"=>"{:enabled=>false}",
              "1578"=>"{:enabled=>false}"}

To this:

hash_thing = {1570 => {:enabled => false},
              1571 => {:enabled => false},
              1572 => {:enabled => false},
              1573 => {:enabled => false},
              1574 => {:enabled => false},
              1575 => {:enabled => false},
              1576 => {:enabled => false},
              1577 => {:enabled => false},
              1578 => {:enabled => false}}

I'd like to be able to do with method chaining if at all possible.

Additional Information

This situation resulted from trying to update multiple attributes off the same key.

Haml:

- @a_feature.each do |af|
  .form-inline.radio-group
    %label= af.feature.name
    =radio_button "a_feature", af.id, [enabled: true], {checked: af.enabled, class:'form-control'}
    %label Yes
    =radio_button "a_feature", af.id, [enabled: false], {checked: !af.enabled, class:'form-control'}
    %label No

Parameters:

 {"utf8"=>"✓",
 "_method"=>"patch",
 "a_feature"=>{
 "296"=>"{:enabled=>true}",
 "344"=>"{:enabled=>false}",
 "376"=>"{:enabled=>false}",
 "commit"=>"Save",
 "agency_id"=>"7"}

Upvotes: 1

Views: 357

Answers (1)

Lordking
Lordking

Reputation: 1413

Here's a quick workaround without using eval

def to_bool(str)
    str == 'true'
end

new_hash = Hash.new
hash_indif.each do |i, j|
    inner_hash = Hash.new
    match_data = /^{:(enabled)=>(false|true)}$/.match(j)
    inner_hash[match_data[1].intern] = to_bool match_data[2]
    new_hash[i.to_i] = inner_hash
end

The new_hash variable contains the output you need -

{1570=>{:enabled=>false}, 1571=>{:enabled=>false}, 1572=>{:enabled=>false}, 1573=>{:enabled=>false}, 1574=>{:enabled=>false}, 1575=>{:enabled=>false}, 1576=>{:enabled=>false}, 1577=>{:enabled=>false}, 1578=>{:enabled=>false}}

Upvotes: 1

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